config/path use pkg_call

config/path

@@ -164,9 +164,7 @@ BUILD_INDENT_SIZE=4
 
 # If sourcing a package, configure any package variables dependent on variables we have set
 if [ -n "$PKG_DIR" -a -r $PKG_DIR/package.mk ]; then
-  if [ "$(type -t configure_package)" = "function" ]; then
-    configure_package
-  fi
+  pkg_call_optional configure_package
 fi
 
 # multilib? nah